LED light assembly and system

Abstract

An LED based light assembly and lighting system is disclosed. The lighting system includes at least one light assembly comprising a plurality of LED chips, a controller and a power supply module. The controller is configured to receive an input signal and to provide an output control signal for controlling power to the at least one light assembly. The power supply module is configured to receive a standard voltage and current signal and to provide a power signal to the at least one light assembly to power the at least one light assembly in response to the control signal.

What is claimed: 
     
       1. An LED based lighting system, comprising:
 at least one light assembly comprising a plurality of LED chips; 
 a controller configured to receive an input signal and to provide a control signal for controlling the at least one light assembly; 
 an ambient light sensor that senses an amount of ambient light and provides an ambient light sensor output signal as a function of an amount of sensed ambient light; and 
 a power supply module configured to receive a standard voltage and current signal, to convert the standard voltage and current signal to a DC voltage signal for powering the controller and to provide a power signal to the at least one light assembly to power the at least one light assembly in response to the control signal; 
 wherein the controller is responsive to the ambient light sensor output signal and is configured to compare the ambient light sensor output signal with a plurality of threshold levels and to provide the control signal to control the light level provided by the at least one light assembly to reduce the amount of light output from a maximum light level to a reduced light level in a plurality of steps in response to the amount of sensed ambient light. 
 
     
     
       2. The LED based lighting system as claimed in  claim 1 , further
 comprising a remote controller housing a plurality of switch settings that provide a respective switch output signal for each switch setting; and wherein the controller is responsive to switch output signal and is configured to provide the control signal to control the maximum light level provided by the at least one light assembly in response to the setting of the plurality of switch settings. 
 
     
     
       3. The LED based lighting system as claimed in  claim 1 , wherein
 the power supply comprises a constant current maintenance circuit that limits the maximum current provided to the at last one light assembly so that even if any one or more LED chips of the plurality of LED chips fail, the constant current control circuit maintains a constant current to a remainder of the plurality of LED chips of the at least one light assembly so that the remainder of the plurality of LED chips continue to operate at a constant current. 
 
     
     
       4. The LED based lighting system as claimed in  claim 1 , further comprising a motion sensor that senses motion and provides a motion sensor output signal; and
 wherein the controller is also responsive to the motion sensor output signal and is configured to provide the control signal to control the maximum light level provided by the at least one light assembly in response to sensed motion. 
 
     
     
       5. The LED based lighting system as claimed in  claim 1 , wherein the at least one light assembly is sized and configured to be replacement for a standard fluorescent light bulb. 
     
     
       6. The LED based lighting system as claimed in  claim 1 , wherein the lighting system comprises a housing that is sized and configured to be a replacement for a standard overhead light fixture. 
     
     
       7. The LED based lighting system as claimed in  claim 6 , wherein the power supply module is external to the at least one light assembly and housed within the housing. 
     
     
       8. The LED based lighting system as claimed in  claim 7 , wherein the at least one light assembly comprises a circuit board housing a plurality of LED chips arranged in at least one row, wherein the circuit board is configured so as to dispose the plurality of LED chips in a spaced apart relationship so as to keep the LED chips below a maximum operating temperature. 
     
     
       9. The LED based lighting system as claimed in  claim 8 , wherein the circuit board is laid out so to keep the chips below a temperature of 41 C. 
     
     
       10. The LED based lighting system as claimed in  claim 8 , wherein the efficiency of the at least one light assembly is at least 125 Lumens/Watt. 
     
     
       11. The LED based lighting system as claimed in  claim 8 , wherein the at least one light assembly further comprises a base having a plurality of arms that define slots along the length of the base to receive and to hold the length wise ends of the circuit board. 
     
     
       12. The LED based lighting system as claimed in  claim 11 , wherein the at least one light assembly further comprises at least one end cap. 
     
     
       13. The LED based lighting system as claimed in  claim 6 , wherein the lighting system comprises at least two light assemblies. 
     
     
       14. The LED based lighting system as claimed in  claim 13 , further comprising a cover that covers that at least two light assemblies, wherein the cover has ridges running along a length of the cover so as to disperse the light provided by at least two light assemblies along a width of the cover and along a width of the lighting system. 
     
     
       15. The LED based lighting system as claimed in  claim 14 , further comprising two rods that maintain the cover in place over the by at least two light assemblies. 
     
     
       16. The LED based lighting system as claimed in  claim 15 , further comprising a reflective background having ridges to reflect the light provided by the at least two light assemblies. 
     
     
       17. The LED based lighting system as claimed in  claim 6 , further comprising: 
       a frame of the housing of the lighting system having a plurality of slots in two ends of the frame; and
 a bracket pin, each bracket pin being shaped and arranged to be pushed through corresponding of the plurality of slots in the frame and into an end of a base of the at least one light assembly. 
 
     
     
       18. The LED based lighting system as claimed in  claim 17 , further comprising a respective hanging bracket and two clips for each of the two ends of the frame of the lighting system that are constructed and arranged to allow for easy installation and removal of each end of the frame of the lighting system to a casing for the lighting system. 
     
     
       19. The LED based lighting system as claimed in  claim 6 , further comprising a plurality of clamps that maintain a cover to the housing of the lighting system. 
     
     
       20. The LED based lighting system as claimed in  claim 1 , wherein the at least one light assembly further comprises a cover having ridges running along a length of the cover so as to disperse the light provided by the plurality of LED chips along a width of the cover and the light assembly.